LOW COST ELECTRET HYDROPHONE

Award Information
Agency:
Department of Defense
Branch
Defense Advanced Research Projects Agency
Amount:
$49,833.00
Award Year:
1989
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
10362
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Waddan Systems
8801 Encino Ave, Northridge, CA, 91325
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr Mahendra Singh
(818) 772-7898
Business Contact:
() -
Research Institution:
n/a
Abstract
RESEARCH TO DESIGN AND DEVELOP A LOW COST ELECTRET HYDROPHONE IS PROPOSED HERE. THE MAIN OBJECTIVE OF THE EFFORT IS TO DEVELOP MICRO-FABRICATION TECHNIQUES TO MAKE MINIATURE HYDROPHONES OF HIGH QUALITY. A SILICON WAFER IS CHEMICALLY ETCHED TO FORM A DIAPHRAGM. A METAL LAYER IS DEPOSITED TO FORM AN ELECTRET. ANOTHER METAL LAYER WAFER IS ALSO ETCHED TO FORM A DIAPHRAGM, BUT OF DIFFERENT THICKNESS. THE TWO WAFERS ARE BONDED TOGETHER TO YIELD A BATCH OF ELECTRET HYDROPHONES. SOUND WAVES PRODUCE DIFFERENT DEFORMATIONS IN THE TWO BACK-TO-BACK DIAPHRAGMS, HENCE, GENERATE A DIFFERENTIAL ELECTRICAL OUTPUT SIGNAL. A RESISTOR CONNECTED ACROSS THE METAL ELECTRODES YIELDS A SIGNAL WHEN THE SOUND WAVES IMPINGE ON THE LAYERED HYDROPHONE DIAPHRAGM.

* information listed above is at the time of submission.

Agency Micro-sites

US Flag An Official Website of the United States Government